SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 59 



Mexico, it seems probable that it was a species that affected a warm 

 climate ; and that it made its way into the northern States only after 

 the climate had become quite mild. 



Figure 4 shows the distribution of known specimens of the giant 

 beaver, Castoroides, except that it is now known to have lived at 

 one time on the Old Crow River in Yukon Territory. The map 

 shows that it was well represented in the old swamps that formed 

 on the top of the Wisconsin drift-sheet in Ohio, Michigan, and 

 Indiana. 



On the next map (fig. 5) are shown the localities where remains 

 of extinct species of peccaries have been discovered. The existing 



FIG. 6. Distribution of Pleistocene musk-oxen. 



members of this family range from Texas to far down into South 

 America. In Pleistocene times, so far as shown by specimens, they 

 hardly came so far south as Texas. Several specimens have been 

 found in deposits overlying Wisconsin drift, as in New York, Ohio, 

 Indiana, and Michigan. That these animals existed in these States 

 long after the last glacial ice had disappeared, there can be no doubt. 

 Figure 6 is intended to represent the known distribution of musk- 

 oxen in mid-latitudes during the Pleistocene. The writer has rec- 

 ords of over 30 specimens. These belong to 4 or 5 genera. Among 

 the species is an Ovibos not yet distinguishable from O. moschatus. 

 Four specimens are known: One from Youngstown, Ohio; one 

 from Richmond, Indiana ; a third from northeastern Iowa ; and a 

 fourth from southeastern Iowa. The Indiana specimen, secured by 



